Highly Efficient Non‐Doped Blue‐Light‐Emitting Diodes Based on an Anthrancene Derivative End‐Capped with Tetraphenylethylene Groups
Highly Efficient Non‐Doped Blue‐Light‐Emitting Diodes Based on an Anthrancene Derivative End‐Capped with Tetraphenylethylene Groups
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DOI：
10.1002/adfm.200700355
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发表时间：
2007-11
影响因子：
19
通讯作者：
Ping-I Shih;Chu-Ying Chuang;Chen‐Han Chien;E. Diau;C. Shu
中科院分区：
文献类型：
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作者：
Ping-I Shih;Chu-Ying Chuang;Chen‐Han Chien;E. Diau;C. Shu
合成并表征了一种新型的蓝色发光材料2-叔丁基-9，10-双[4-（1，2，2-三苯基乙烯基）苯基]蒽（TPVAn），该材料含有一个蒽核和两个四苯乙烯封端基团.由于其空间拥挤的端基的存在，TPVAn具有高玻璃化转变温度（155 °C）并且形态稳定。利用TPVAn作为发射体的有机发光二极管（OLED）表现出明亮的饱和蓝光发射（国际照明委员会（CIE）色度坐标x = 0.14和y = 0.12），效率高达5.3%（5.3 cd A-1）-这是迄今为止报道的非掺杂深蓝色发光OLED的最佳性能。此外，掺杂有橙子荧光团的TPVAn充当用于构建白色发光器件的真实主体，该器件显示出有希望的电致发光特性：最大外部量子效率达到4.9%（13.1 cd A-1），CIE坐标位于（0.33，0.39）。
A novel blue‐emitting material, 2‐tert‐butyl‐9,10‐bis[4‐(1,2,2‐triphenylvinyl)phenyl]anthracene (TPVAn), which contains an anthracene core and two tetraphenylethylene end‐capped groups, has been synthesized and characterized. Owing to the presence of its sterically congested terminal groups, TPVAn possesses a high glass transition temperature (155 °C) and is morphologically stable. Organic light‐emitting diodes (OLEDs) utilizing TPVAn as the emitter exhibit bright saturated‐blue emissions (Commission Internationale de L'Eclairage (CIE) chromaticity coordinates of x = 0.14 and y = 0.12) with efficiencies as high as 5.3 % (5.3 cd A–1)—the best performance of non‐doped deep blue‐emitting OLEDs reported to date. In addition, TPVAn doped with an orange fluorophore served as an authentic host for the construction of a white‐light‐emitting device that displayed promising electroluminescent characteristics: the maximum external quantum efficiency reached 4.9 % (13.1 cd A–1) with CIE coordinates located at (0.33, 0.39).